Continuous centrifugal machine



Nov. 19, 1929 'r. LANGENBERG 1,736i349 CONTINUOUS CENTRIFUGAL CHINE Filed Feb. 12,1927

0 I I 2 v M ///7'% I Q H II 19 I 17 1 I 7 I "I I} l INVENTOP Patented Nov. 19, 1929 UNITED STATES PATENT OFFICE THEODOR LANGENBERG, OF BERLIN, GERMANY, ASSIGNOR TO THE FIRM C. A.,'.FESCA & SQHN, OF BERLIN-LIGHTENBERG, GERMANY CONTINUOUS CENTRIFUGAL MACHINE Application filed February 12, 1927, Serial No. 167,769, and in Germany October 1, 1926.

Continuous centrifugal machines have become known, the two drums of which are pressed by hydraulic drive the one upon the other during the centrifuging and moved away the one from the other during the discharging. v

In these centrifugal machines the hydraulic drive acts upon the step bearing of the lower centrifugal drum. The considerable axial pressure which occurs at the centrifuging acts consequently upon the supporting frame of the centrifugal machine which must be built very strongly. The centrifugal machine is very expensive as the bearings must be of very strong'construction, as the axial pressure acts also upon the same.

I In order to simplify the construction of the frame and to avoid ball hearings to be submitted to high stress, the hydraulic drive is arranged, according to the invention, between the two drums axially to the drum shaft. The axial pressure which occurs during the centrifuging is intercepted by the hydraulic drive and does no longer act upon the frame nor upon the bearings. The frame and the bearings can consequently be very light.

is connected with the upper drum, for instance by means of ribs, and it is guided in a cylinder of the lower drum. The piston of the hydraulic driving gear is connected to the lower drum and situated in the cylinder of the upper drum. The pressure fluid is admitted into the cylinder through an axial bore of the shaft.

The invention is specially adapted for so called sifting centrifugal machines in which the circumferences of the drums are not perforated. As to the sifting centrifugal machines a very liquid material is fed. the hydraulic driving mechanism situated between the drum, and specially the ribs between the upper drum and the cylinder of the hydraulic drive, do not form an obstacle at the charging. The invention is also applicable to sifting drums.

Two embodiments of the invention areshown, by way of example, in the accompanylng drawings, in which The cylinder of the hydraulic driving gear Fig. 2 shows in cross section a vertical centrifugal machine.

As shown in Fig. 1 the upper sifting cup 1 is connected to the hollow driving shaft 2 which is enlarged to form a flange. The hollow shaft 2 is journaled in any convenient well known manner, and the material to be centrifuged is supplied through the bore 3 of shaft 2 The sifting cup 1 is connected by ribs 4 with a cylinder 5 guided in a cylinder 6 of the lower sifting cup 7. In the cylinder 5 a piston 8 is located which is connected to the lower sifting cup 7 by means of a journal 9. The journal 9 traverses a centrifugal bore of bottom plate 10 of the cyl inder 5 and is packed by a packing ring 11.

When through the centrifugal bore 12 of the journal 9 oil or any other liquid is forced into the cylinder 5 underneath the piston 8,

the rims 14 and 15 of the sifting cups 1 and 7 are pressed the one upon the other and the centrifugal machine is closed.

The liquid constituents of the material fed into the centrifugal machine can be thrown out, at the rotating movement of the centrifugal machine, through the holes 13, whilst the solid constituents remain in the drums.

a driving shaft. It is journalled in a neckjournal-bearing 16, which'is hingedly connected to several radial rods 17. These radial rods 17 traverse horizontal bores 18 in the frame '19 and rubber buffers 21 are enclosed between the supporting frame and disks 20 fixed on the outer ends of the rods 17, said rubber buffers being designed to absorb the vibrations which occur when the machine is working. The lower end of shaft 9 is mounted in an axial pressure bearing, which is loaded only by the weight of the centrifugal machine but not by the axial pressure occurrigg at the centrifuging.

n order that in the centrifugal machine shown in Fig. 2 the rims l4 and 15 may move away the one from the other when the pres sure fluid is withdrawn from the cylinder 5, a spiral spring 22, or any other lifting device, is arranged between the bottom plate 10 of the cylinder 5 and the lower sifting cup 7. This spring raises the upper sifting cup 1 a suflicient distance when the liquid is being withdrawn from the cylinder 5.

For the upper sifting cup a simple lid might be substituted.

I claim 1. A permanently acting centrifugal machine comprising two drum parts, each of which is provided with apertures for expulsion of the material acted on, in combination with an axially acting hydraulic press rotatable therewith, said press comprising a cylinder connected to one of said drum parts and a piston connected to the other drum part.

2. A permanently acting centrifugal machine comprising two drum parts, in combination with an axially acting hydraulic press comprising a cylinder connected to one of said drum parts and a piston connected to the other drum part, said second drum part being provided with a cylinder which forms a guide for the first mentioned cylinder.

8. A permanently acting centrifugal machine comprising two drum parts, each of which is provided with apertures for expul sion of the material acted on, in combination with an axially acting hydraulic press located therebetween and comprising a cylinder and a piston, said cylinder being rigidly connected to one drum part and said piston being rigidly connected to theother drum part.

4. A permanently acting centrifugal machine comprising two drum parts, in combination with an axially acting hydraulic press comprising a cylinder connected to one drum part, a piston rod connected to the other drum part, having a piston secured thereto, said rod having a bore therein to transmit fluid to said cylinder.

5. In a centrifugal machine, the combination with a pair of concave plates between which the material is confined, of means for retaining said plates in cooperative engagement during the centrifuging process comprising a cylinder directly and rigidly connected to one plate and a piston directly and rigidly connected to the other plate.

In testimony whereof I aflix my signature.

THEODOR LANGENBERG. 

